Exhaust nozzle



June 28, 1938. J s JR 2,122,211

EXHAUST NOZZLE Filed Oct. 11, 1937 Inventor A fiorneys Patented June 28, 1938 UNHTED STATES PATENT OFFIQE 2 Claims.

This invention relates to an exhaust nozzle for locomotives, the general object of the invention being to so form the nozzle that the draft will be increased and back pressure in the cylinders will be reduced and the efilciency of the comotive will be generally improved.

This invention also consists in certain other features of construction and in the combination and arrangement of several parts, to be herein- 10 after fully described, illustrated in the accompanying drawing and specifically pointed out in the appended claims.

In describing the invention in detail, reference will be had to the accompanying drawing wherein like characters denote like or corresponding parts throughout the several views, and in which:-

Figure l is a top plan View of the nozzle.

Figure 2 is a sectional view but only showing one of the vanes.

In this drawing the numeral I indicates a cylinder which is provided with the annular rib 2 on its exterior which forms a rest for the device in the stand pipe. The cylinder has the lower end of its bore flaring as shown at 3 so that the steam from the exhaust pipe can readily pass into the same and in carrying out my invention I form a plurality of vanes 4 on the internal wall of the cylinder, each vane being of substantially wedge-shape in cross section with its base connected with the cylinder wall and each vane slopes upwardly at an angle with respect to the vertical. The underside face of each vane is concave as shown at 5 and the opposite side face is convexed as shown at .6. The lower end of each vane gradually curves to a substantially feathered edge I! so that said lower end will not offer any obstruction to the entrance of the steam into the nozzle. As will be seen these vanes are of such width as to leave a comparatively large space at the center of the nozzle which allows exhaust steam to pass through without obstruction and the peculiar shape of the vanes acts to draw steam from the stream to 5 themselves and then direct this steam on an angle from the center stream and this steam as it leaves the vanes goes against the walls of the petticoat pipe, filling the same and thereby causing a vacuum in the smoke box. The vanes cause the steam which comes in contact with them to leave the nozzle at an angle, thereby filling the stack and due to the fact that said vanes are sharpened on the lower ends, thereby causes very little resistance, and also due to the large open space in the center of the nozzle, the exhaust steam will escape through the nozzle and out the stack so quickly and easily that in addition to creating a vacuum in the smoke box 10 it leaves the cylinders immediately on completing its work and is out of the way of the next stroke of the piston voluntarily, without having to be forced out by the piston. This allows for greater speed, less back pressure knock, which 15 is easier on main and side rods and the driving boxes. Besides making for easier draft on the fire the invention causes a saving in fuel.

It is thought from the foregoing description that the advantages and novel features of the 20 invention will be readily apparent.

It is to be understood that changes may be made in the construction and in the combination and arrangement of the several parts, provided that such changes fall within the scope 25 of the appended claims.

Having described the claimed as new is:

1. An exhaust nozzle for a locomotive comprising a cylinder and a plurality of vanes con- 30 nected with the internal walls of the cylinder, each vane being arranged at an angle and each vane being of Wedge shape in cross section with its underside face concave and its other side face convexed, each vane being of substantially the 35 same width from end to end.

2. An exhaust nozzle for a locomotive comprising a cylinder and a plurality of vanes connected with the internal walls of the cylinder, each vane being arranged at an angle and each vane being of wedge shape in cross section with its underside face concave and its other side face convexed, each vane being of substantially the same width from end to end and the lower end of each vane tapering downwardly from its concave face to its convex face.

invention, what is JOHN MILLS, JR. 

